The effect of the addition of sodium compounds in the liquid-phase hydrodechlorination of chlorobenzene over palladium catalysts

Catalytic hydrodechlorination reactivity of monochlorophenols in aqueous solutions over palladium/carbon catalyst

“…In the liquid-phase system the presence of a base acts as a proton scavenger, maintaining the catalytic metal in a reduced state and limiting Cl interaction(s) [14,30].Therefore, when there was no base in the dechlorination reaction, because of the inhibitory effect of HCl on Pd/C catalyst, the dechlorination rates of 2-CP and 4-CP were lower than those using bases, such as NaOH, Et 3 N ( Table 2). Furthermore, it was also observed that the dechlorination rates of 2-CP and 4-CP were different in aqueous solutions and in ethanol systems when the bases were different in the reactions.…”

The Pd-catalyzed hydrodechlorination of chlorophenols in aqueous solutions under mild conditions: A promising approach to practical use in wastewater

“…It is known that HCl is produced in the heterogeneously catalytic hydrodechlorination of organochlorines in liquid systems [19]. In order to eliminate the poison of HCl to the catalyst, some bases are usually used in the dechlorination reactions.…”

“…Chlorides derived from the dechlorination reaction were easy to result the catalysts in the deactivation in organic solvent systems [19][20][21]. We have reported the heterogeneously catalytic hydrodechlorination of aromatic halides with hydrogen gas over Pd/C in liquid phase.…”

Pd/C-catalyzed hydrodehalogenation of aromatic halides in aqueous solutions at room temperature under normal pressure

“…For most dehalogenation reactions of aromatic halides in liquid phase, it was general to select organic solvents as the reaction medium. Chloride and HCl derived from the dechlorination reaction has been shown to inhibit the activity of Pd and Rh-Pt in liquid-phase dechlorination of chlorobenzene [16][17][18]. However, the addition of water greatly improved the reaction rates and the stability of the catalyst in the catalytic hydrodechlorination of triclosan in the liquid phase [18].…”